package handler

import (
	"encoding/json"
	"github.com/gin-gonic/gin"
	"homework11/cache"
	"homework11/model"
	"strconv"
	"time"
)

func Add(c *gin.Context) {
	title := c.PostForm("title")
	content := c.PostForm("content")

	if title == "" || content == "" {
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "字段不能为空",
		})
		return
	}

	data := model.Article{
		Title:   title,
		Content: content,
	}
	err := model.DB.Create(&data).Error
	if err != nil {
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "添加失败",
		})
		return
	}
	c.JSON(200, gin.H{
		"code": 200,
		"msg":  "添加成功",
	})
	return
}

func Del(c *gin.Context) {
	id := c.PostForm("id")

	var article model.Article
	err := model.DB.Where("id=?", id).Delete(&article).Error
	if err != nil {
		c.JSON(200, gin.H{
			"code": 500,
			"msg":  "删除失败",
		})
		return
	}
	redis_key := "redis_del" + id
	cache.Rdb.Del(cache.Ctx, redis_key)
	c.JSON(200, gin.H{
		"code": 200,
		"msg":  "删除成功",
	})
	return
}

func List(c *gin.Context) {

	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	size, _ := strconv.Atoi(c.DefaultQuery("size", "5"))
	offset := (page - 1) * size

	var article []model.Article
	model.DB.Offset(offset).Limit(size).Find(&article)

	var total int64
	model.DB.Model(&model.Article{}).Count(&total)

	redis_key := "list"
	cacheData, _ := cache.Rdb.Get(cache.Ctx, redis_key).Result()

	if cacheData == "" {
		model.DB.Find(&article)
		jsonData, _ := json.Marshal(&article)
		cache.Rdb.Set(cache.Ctx, redis_key, jsonData, time.Hour*2)
	}

	c.JSON(200, gin.H{
		"code":  200,
		"msg":   "添加成功",
		"data":  article,
		"total": total,
	})
	return
}
